$ perl5.10.1 foo
Use of implicit split to @_ is deprecated at foo line 65.
Use of implicit split to @_ is deprecated at foo line 91.
Use of implicit split to @_ is deprecated at foo line 101.
                      Rate end_of_substring tr_and_end end_slurped   all split while tr_and_split tr_and_split_redux tr_moar_magic
end_of_substring    2899/s               --       -20%        -21%  -23%  -54%  -63%         -77%               -77%          -95%
tr_and_end          3634/s              25%         --         -1%   -4%  -42%  -54%         -72%               -72%          -94%
end_slurped         3679/s              27%         1%          --   -3%  -41%  -53%         -71%               -71%          -94%
all                 3779/s              30%         4%          3%    --  -40%  -52%         -70%               -71%          -94%
split               6258/s             116%        72%         70%   66%    --  -20%         -51%               -51%          -90%
while               7843/s             171%       116%        113%  108%   25%    --         -39%               -39%          -87%
tr_and_split       12788/s             341%       252%        248%  238%  104%   63%           --                -0%          -79%
tr_and_split_redux 12837/s             343%       253%        249%  240%  105%   64%           0%                 --          -79%
tr_moar_magic      60606/s            1990%      1568%       1547% 1504%  868%  673%         374%               372%            --